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首页> 外文期刊>Journal of Geographic Information System >Orthorectification and Digital Elevation Model (DEM) Generation Using Cartosat-1 Satellite Stereo Pair in Himalayan Terrain
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Orthorectification and Digital Elevation Model (DEM) Generation Using Cartosat-1 Satellite Stereo Pair in Himalayan Terrain

机译:在喜马拉雅山地形中使用Cartosat-1卫星立体声对生成正射和数字高程模型(DEM)

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High resolution data have high relief displacement in hilly terrains. Development of Digital Elevation model helps to assess bio resources more accurately in such terrains. While estimating bio resources in the Himalayan hilly terrain using multispectral LISS-III data of 23 m spatial resolution, the need for orthorectifcation of satellite data was necessary to correct for spatial distances due to high undulating slopes. Therefore, Cartosat stereo pair based Digital Elevation Model (DEM) was generated using the Rational Polynomial Coefficients (RPC) supplied along with the data products. By using the DEM orthorectification of LISS-III was created. In order to evaluate the positional accuracy of ortho rectified LISS-III Ground control points were selected using the Global Positioning System in differential GPS mode. As there is variation in the spatial distances and height over few points, the GCP corrected DEM was used for ortho rectifcation of Cartosat PAN and LISS-III data. This paper presents the procedure followed for ortho rectification and digital elevation model generation using Cartosat stereo pair data. The result of the study indicated high spatial resolution stereo images helped generation of three dimensional mountainous regions more accurately which helps in estimating the bio resources using multispectral LISS III data.
机译:高分辨率数据在丘陵地形中具有较高的浮雕位移。数字高程模型的开发有助于更准确地评估此类地形中的生物资源。在使用23 m空间分辨率的多光谱LISS-III数据估算喜马拉雅丘陵地带的生物资源时,由于起伏较大的坡度,需要对卫星数据进行正射校正以校正空间距离。因此,使用随数据产品一起提供的有理多项式系数(RPC)生成了基于Cartosat立体声对的数字高程模型(DEM)。通过使用DEM,创建了LISS-III的正射。为了评估经正交矫正的LISS-III的位置精度,使用了差分GPS模式下的全球定位系统选择了地面控制点。由于空间距离和高度在几个点上都存在变化,因此使用了GCP校正的DEM来对Cartosat PAN和LISS-III数据进行正射校正。本文介绍了使用Cartosat立体声对数据进行正射校正和数字高程模型生成的过程。研究结果表明,高空间分辨率的立体图像有助于更准确地生成三维山区,这有助于使用多光谱LISS III数据估算生物资源。

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